Photographic-plate-developing apparatus.



No. 75,301. Patented Dec, 9, I902.

J. G. SCHODRBN. PHOTOGRAPH": PLATE DEVELOPING APPARATUS.

- (Application filed Mar. 25, 1902.)

(NoMudeL) iiigiinammm 10.17%1022 zga'zzzzmgan m: ucmms m5 :0 PHOTO-LEMwa-summa, m c.

UNITE STATES JOHN G. SCHODRON, OF MILWAUKEE, WISCONSIN.

PHOTOG RAPHlC-PLATE-DEVELO PING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 715,301, dated December9, 1902. Application filed March 25, 1902. $erial No. 99,848. (Nomodel.)

To all whom? it may concern:

Be it known that LJOHN G. Sononsoma citizen of the United States,residing at Milwaukee, county of Milwaukee, and State of Wisconsin, haveinvented'a certain new and useful Improvement in Photographic-PlateDeveloping Apparatus, of which the following is a specification.

My invention relates to a new and useful improvement inphotographic-plate-development apparatus, and has for its object toprovide an apparatus which will mechanically oscillate the traycontaining this development solution in which the photographic plate isimmersed.

With this end in view the invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claim.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, the constructionand operation will now be described in detail, referring to theaccompanying drawings, forming a part of this specification, in whichFigure 1 is a longitudinal-section through the apparatus; Fig. 2, asection upon the line 2 2 of Fig. 1.

A represents a suitable base.

B is a bearing secured to the base A.

C is a plate having 21. depending lug C, which lug carries a stud Gwhich is journaled in the bearing B.

D is a tray which is secured upon the top of the plate 0, and in thistray is adapted to rest the developing-tray containing the solution andthe plate to be developed.

E is a casing secured to the base A, and in this casing is located amotor F. This may be either a spring or an electric motor; but I preferto use an electric motor and have'so shown it in the drawings. Theterminals of this motor are connected to the binding-posts G, and themotor is adapted to be started and stopped by means of the switch H ofthe ordinary construction. Upon the power-shaft of the motor is locateda small gear-Wheel I, which is adapted to mesh with the large gearwheelJ, journaled in suitable bearings.

K is an arm secured at one end to the tray D and projects through anopening formed in the casing and has in its outer end a slot L,throughwhich is adapted to protrude a stud M, which is clamped in theslot N in the large gear-wheel J. Thus as the large gear-wheel J isrevolved the stud N, operating in the slot L of the arm K, will act as aoran k-shatt and Work the arm K up and ddwn a distance determined by thedistance the stud M is from the center of the wheel J. This raising andlowering of the arm K will oscillate the tray D upon the pivot 0 Thestud M is adjustable in the slot N of the gear-whcel'J, and thus theoscillation can be regulated by the adjusting of the stud toward or awayfrom the center of the wheel J.

It is very essential in developing plates to keep the tray in which theplate is developed continually moving, so as to prevent the settling ofthe developer upon the plate. This is very tiresome work to be donebyhand, and the advantage of my invention is that this oscillation of thetray can be accomplished by my apparatus, which will do away with thetiresome method of doing it by hand and also allow the operator toattend to other work while the plate is developing. In fact, he may havea number of plates developing at the same time and be able to look afterthem all at once.

It will be noticed that the pivotal point of the tray is situated sothat the tray and the arm K will be equally balanced upon the pivotalpoint. Therefore it requires very little power to oscillate the tray,and a very small and inexpensive motor will be sufticient to oscillate atray of comparatively large size. This enables the apparatus to be madecomparatively cheap and inexpensive to operate.

Of course I do not wish to be limited to the exact construction hereshown, as slight modifications could be made without departing from thespirit of my invention.

Having thus fully described my invention, what I claim as new and usefulislnadevice of the character described,a suitable base, a tray in whichthe developing-tray is adapted to rest, a bearing secured to the base, aplate secured to the under side of the tray, 3. lug depending from saidplate, said lug pivoted to the bearing arising from the base, a suitablecasing, a motor located in the casing, a small gear'wheel located uponthe power-shaft of the motor, a large gear-wheel I motor, substantiallyas and for the purpose journaled in suitable bearings and adaptedspecified.

to be in mesh with the smaller gear-Wheel, the In testimony whereof Ihave hereunto aflarger gear-Wheel provided with a slot, a stud fixed mysignature in the presence of two subclamped in said slot, an arm securedat one scribing witnesses.

end to the tray and extending inward in the a casing through a suitableopening, said arm JOHN SOHODRON' provided with a slot through which thestud Witnesses:

secured in the gear-Wheel is adapted to pro- JOHN H. WIERSUM,

l0 trude, means for starting and stopping the EMIL J. ZINGEN.

